Optical article having anti-theft feature and a system and method for inhibiting theft of same

ABSTRACT

A system for altering a functionality of an optical article from a pre-activated state to an activated state, comprising an optical article comprising an optical data layer for storing data, an external radiation source for generating an external stimulus adapted to interact with the optical article, such interaction causing a change in optical accessibility of optically stored data, a directing material, wherein said directing material is for directing the external stimulus to selective portions of the optical article, thereby altering the functionality of the optical article from a pre-activated state to an activated state; a convertible element capable of responding to the external stimulus to irreversibly alter the optical article from the pre-activated state of functionality to the activated state of functionality, wherein said convertible element comprises a color-shift dye, a magnetic material, a thermo-chromic material, a magneto-optical material, a light scattering material, a phase-change material, dye aggregates, or combinations thereof.

CROSS-REFERENCE OT RELATED APPLICATIONS

This application is a continuation of Ser. No. 11/286,279, entitled“OPTICAL ARTICLE HAVING ANTI-THEFT FEATURE AND A SYSTEM AND METHOD FORINHIBITING THEFT OF SAME” in the name of Marc Brian Wisnudel et al.,filed on Nov. 21, 2005, which is hereby incorporated herein byreference.

BACKGROUND

The invention relates generally to optical articles. More particularly,the invention relates to anti-theft features for an optical article andmethods of making same.

Shoplifting is a major problem for retail venues and especially forshopping malls, where it is relatively difficult to keep an eye on eachcustomer while he shops or moves around in the store. Relatively smallerobjects, such as CDs and DVDs are easy targets as they can be easilyhidden and carried out of the shops without getting noticed. Shops, aswell as the entertainment industry, incur monetary losses because ofsuch instances. Due to the sensitive nature of the information storedinside, this problem become more severe if the CDs or DVDs are stolenfrom places like offices.

Even though close circuit surveillance cameras may be located at suchplaces, shoplifting or stealing still occurs. Consumable productssometimes are equipped with theft-deterrent packaging. For example,clothing, CDs, audio tapes, DVDs and other high-value items sometimesare packaged along with tags that set off an alarm if the item isremoved from the store without being purchased. These tags areengineered to detect and alert for shoplifting. For example, tags thatare commonly used to secure against shoplifting are the Sensormatic®electronic article surveillance (EAS) tags based on acousto-magnetictechnology. RFID tags are also employed to trace the items in storeshelves and warehouses. Other theft-deterrent technologies currentlyused for optical discs include special hub caps for DVD cases that lockdown the disc and prevent it from being removed from the packaging untilthe it is purchased, and “keepers” that attach to the outside of the DVDcase packaging and also prevent the opening of the package until it ispurchased. In some cases, retailers have resorted to storing merchandisein locked glass display cases. In other stores, the DVD cases on theshelves are empty, and the buyer receives the actual disc when the movieis purchased. Many of these approaches are unappealing in that they addan additional inconvenience to the buyer or store owner or they are notas effective at preventing theft as desired. Optical storage media, inparticular, pose an additional problem in that they are very easy toremove from their packaging and the sensor/anti-theft tags may beremoved easily.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of an optical storage medium having aconvertible material disposed thereon and in one of the twofunctionality states in accordance with an exemplary embodiment of theinvention.

FIG. 2 is a cross-sectional side view of the optical storage medium ofFIG. 1 taken along line II-II.

FIG. 3 is a schematic view of an optical storage medium having aconvertible material disposed in a discrete area in accordance with anexemplary embodiment of the invention.

FIG. 4 is a partial perspective view of an identification card having aconvertible material disposed on an optical layer in accordance with anexemplary embodiment of the invention.

FIG. 5 is a diagrammatical representation of a method for changing afunctionality of an optical storage medium in accordance with anexemplary embodiment of the invention.

FIG. 6 is a perspective view of an optical storage medium disposedinside a packaging in accordance with an exemplary embodiment of theinvention.

FIG. 7 is a diagrammatical representation of a method for changing afunctionality of an optical storage medium in accordance with anexemplary embodiment of the invention.

FIG. 8 is a flow chart illustrating a business method for the sale of anoptical storage medium in accordance with an exemplary embodiment of theinvention.

FIG. 9 is a schematic view of an optical storage medium having radiofrequency circuitry disposed thereon in accordance with an exemplaryembodiment of the invention.

FIG. 10 is a schematic view of an optical storage medium having radiofrequency circuitry disposed thereon in accordance with an exemplaryembodiment of the invention.

FIG. 11 is a partial perspective view of an identification card having aconvertible material disposed on an optical layer in accordance with anexemplary embodiment of the invention.

FIG. 12 is a diagrammatical representation of a method for changing afunctionality of an optical storage medium in accordance with anexemplary embodiment of the invention.

FIG. 13 is a flow chart illustrating a business method for the sale ofan optical storage medium in accordance with an exemplary embodiment ofthe invention.

FIG. 14 is a schematic view of an optical storage medium having anelectro-chromic structure disposed thereon in accordance with anexemplary embodiment of the invention.

FIG. 15 is a cross-sectional side view of the electro-chromic structureof the optical storage medium of FIG. 14 in accordance with an exemplaryembodiment of the invention.

FIG. 16 is a partial perspective view of an identification card having aconvertible material disposed on an optical layer and in one of the twofunctionality states in accordance with an exemplary embodiment of theinvention.

FIGS. 17-18 are cut away perspective views of an optical storage mediumhaving an electro-chromic structure disposed within in accordance withexemplary embodiments of the invention.

FIG. 19 is a cut away perspective view of an optical storage mediumhaving a layer of thermo chromic material disposed within in accordancewith exemplary embodiments of the invention.

FIG. 20 is a diagrammatical representation of a method for disabling atailored menu to change a functionality of an optical storage medium inaccordance with an exemplary embodiment of the invention.

FIG. 21 is a cross-sectional view of an arrangement for applying voltageto an electro-chromic structure in accordance with an exemplaryembodiment of the invention.

FIG. 22 is a flow chart illustrating a business method for the sale ofan optical storage medium in accordance with an exemplary embodiment ofthe invention.

FIG. 23 is a graphical representation of the change in percenttransmittance of a photo-bleachable dye upon interaction with anexternal stimulus.

FIG. 24 is a graphical representation of the change in percenttransmittance of an electro-chromic structure upon interaction with anelectrical stimulus.

SUMMARY

Embodiments of the invention are directed to an optical article havingan anti-theft feature and a method for inhibiting theft of the same.

One exemplary embodiment of the invention is an optical article capableof being transformed from a pre-activated state of functionality to anactivated state of functionality. The optical article includes anoptical data layer for storing data, and a convertible element disposedin or proximate to the optical article and being responsive to anexternal stimulus. The convertible element is in optical communicationwith the optical data layer. The convertible element may irreversiblyalter the optical article from the pre-activated state of functionalityto the activated state of functionality upon interaction with theexternal stimulus, and the data is read from the optical data layer inthe activated state of functionality.

Another exemplary embodiment is a system for altering a functionality ofan optical article. The system includes an external stimulus forgenerating radiation in a predetermined wavelength range. Further, thesystem includes an optical article having an optical data layer for tostoring data and a convertible material disposed in or proximate to theoptical article. The convertible material can change a property of saidoptical article upon interaction with the predetermined wavelength rangeto irreversibly alter the optical article from a pre-activated state offunctionality to the activated state of functionality.

Another exemplary embodiment is a system for altering a functionality ofan optical article from a pre-activated state to an activated state. Thesystem includes an optical article, an external radiation source, and adirecting material. The external radiation source generates an externalstimulus adapted to interact with the optical article, such interactioncausing a change in optical accessibility of optically stored data. Thedirecting material is disposed on or proximate to the optical article,where the directing material may direct the external stimulus toselective portions of the optical article, thereby altering thefunctionality of the optical article from a pre-activated state to anactivated state.

Another exemplary embodiment is a method for altering functionality ofan optical article from a pre-activated state to an activated state. Themethod includes providing an optical article which is accessible by anoptical access device that is enabled to first access a menu ofallowable methods by which the optical access device may further accessthe optical article. Further, the method includes creating two menus onthe optical article, wherein a first menu accessible by the opticalaccess device allows execution of pre-activation commands oraccessibility to pre-activation data, and wherein a second menu allowsexecution of post-activation commands or accessibility topost-activation data. Furthermore, the method includes providing a meansto render the first menu inaccessible by the optical access device insuch a manner that the optical access device accesses the second menu.

Another exemplary embodiment is a method for exposing an optical articleto an external stimulus, where the optical article includes an opticaldata layer for storing data and a convertible material disposed in orproximate to the optical article. The convertible element is in opticalcommunication with the optical data layer and convertible materialchanges upon exposure to the external stimulus, said change irreversiblyconverting the optical article from a pre-activated state to anactivated state.

Another exemplary embodiment is a method for selling an optical articleincluding receiving an optical article that includes an optical datalayer for storing data and a convertible material disposed in orproximate to the optical article. The convertible element is in opticalcommunication with the optical data layer and may to enable a change offunctionality of the optical article from a pre-activated state to anactivated state. The data is read from the optical data layer in theactivated state of functionality. The method also includes conductingmonetary transaction at a first location.

These and other advantages and features will be more readily understoodfrom the following detailed description of preferred embodiments of theinvention that is provided in connection with the accompanying drawings.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Embodiments of the invention relate to an optical article having ananti-theft feature to inhibit theft or un-authorized use of the opticalarticle. As used herein, the term “optical article” refers to an articlethat includes an optical data layer for storing data. The stored datamay be read by, for example, an incident laser. The optical data layermay include one or more layers. Further, the optical data layer may beprotected by employing a protective outer coating. The protective outercoating is transparent to the incident laser, that is, the protectiveouter coating allows the incident laser to pass through and reach theoptical data layer.

The optical article may be an optical storage medium, such as a compactdisc (CD), a digital versatile disc (DVD), multi-layer structures, suchas DVD-5 or DVD-9, multi-sided structures, such as DVD-10 or DVD-18, ahigh definition digital versatile disc (HD-DVD), a blu-ray disc, a nearfield optical storage disc, a holographic storage medium, or anotherlike volumetric optical storage medium, such as, for example, two-photonor multi-photon absorption storage format. As will be described indetail below, if the optical article is taken out of its packagingwithout being authorized, or if the optical article is attempted to beplayed without being authorized, the anti-theft feature may render thearticle un-readable or readable only for a finite period of time beforemaking it permanently unreadable.

In other embodiments, the optical article may also include anidentification card, a passport, a payment card, a driver's license, apersonal information card, or other security documents, all of whichemploy an optical data layer for data storage. As will be described indetail below, in these embodiments, the anti-theft feature renders thearticle unreadable by the reader until it is processed prior to beingissued to the concerned authority. Hence, if the article is stolenbefore being issued, the data in the optical data layer is not readableand therefore the article is prevented from any un-authorized use beforeissuance.

In embodiments of the invention, the optical article may be transformedfrom a pre-activated state of functionality to an activated state offunctionality. This conversion from the pre-activated state to theactivated state is performed while authorizing the optical article foruse. Data is read from at least a portion of the optical data layer inthe activated state of functionality. Data may or may not be read fromat least a portion of the optical data layer in the pre-activated stateof functionality. A convertible element is disposed in or proximate tothe optical article. The convertible element may alter the state offunctionality of the optical article from the pre-activated state to theactivated state. The convertible element changes the state offunctionality of the optical article by interacting with one or moreexternal stimulus. In some embodiments, the convertible element iscapable of irreversibly altering the state of functionality of theoptical article. Further, the convertible element is in opticalcommunication with the optical data layer.

As used herein, the “pre-activated state” of functionality refers to astate of functionality of the optical article where the convertibleelement has not yet been exposed to one or more external stimulus aswill be described in the various embodiments of the invention. In thepre-activated state, the optical article may or may not be readable,that is, in the pre-activated state the data on the optical data layermay or may not be read by the incident laser.

In an exemplary embodiment, some or all of the portions of the opticaldata layer may not be read by the incident laser in the pre-activatedstate. For example, the convertible element may alter the opticalproperty of the optical data layer in certain portions and make the datain these portions un-accessible to the incident laser. In embodimentswhere the data in some portions of the optical data layer is unreadable,the optical article when played in the player may result in undesirablenoise or disturbances when the data is attempted to be read from theseunreadable portions, while the other portions may be read withoutdisturbances. Alternatively, making some portions unreadable may lead tothe whole optical article being unreadable.

CDs and DVDs may utilize an error-correction scheme to correct forimperfections in or on the disc, such as replication imperfections,dust, fingerprints, and poor mastering of the data. One error detectionand correction code used on CDs is called the Cross InterleaveReed-Solomon Code (CIRC). CDs use data redundancy and interleaving todetect and correct errors. The CIRC error correction used in CD drivesand players is composed of two stages called C1 and C2 withde-interleaving of data between the stages. Generally, a drive candetect and correct two bad symbols per block in the first stage andthree or four bad symbols per block in the second stage (depending onthe drive). Hence, errors can be described as C1 correctable if they arecorrected in the first stage and C2 correctable if they are corrected inthe second stage. An E11 error means one bad symbol was corrected in thefirst stage, E21 means two bad symbols were corrected in the firststage. E31 means three bad symbols were present in the first stage; thisblock is uncorrectable at the C1 stage and so is passed to the secondstage. E12 means one bad symbol was corrected in the second stage andE22 means two bad symbols were corrected in the second stage. E32 meansthere were 3 or more bad symbols in the second stage. Some drives cancorrect up to 4 bad symbols at the second stage. If the error cannot becorrected in the second stage, it generally results in an uncorrectableerror.

DVD players use a different error correction protocol based on a ReedSolomon product code. A block of data is examined using parity rows andcolumns. In this case, if there are six bad bytes in a row, the row isflagged as a PI (inner parity) failure or error. The raw data may stillbe recovered using outer parity bytes. If there are more than seven badbytes in a column, the column is flagged as a PO (outer parity) failureor error. Blocks that are flagged as PO failures are unusable and datais lost. The impact of the convertible element on error type (C1, C2, oruncorrectable error in the case of CD and PI or PO failure errors in thecase of DVD) will be a function of the disc format, the number ofconvertible elements, and the density and physical placement of theconvertible elements. Hence, in one state, the convertible element caninduce a C1 error, C2 error, PI error, PO error, an uncorrectable error,a bad sector, or the like, as well as combinations comprising at leastone of the foregoing. The convertible element may also cause one databit to change data state relative to a predetermined data state.

In other embodiments, the data of the optical data layer may be readablein the pre-activated state, but only for a definite period of time.Consequently, after the definite time period elapses, the data of theoptical layer may become unreadable for the incident laser. As will bedescribed in detail below, in such cases, the convertible element mayalter the optical property of the optical article and render at least aportion of the optical data layer unreadable after the definite periodof time, such that the optical article may self destroy, that is, becomeunreadable, once the definite period of time elapses. Contrary to thepre-activated state, the “activated state” of functionality of theoptical article refers to the state where the optical article has beenexposed to one or more external stimulus as will be described withregard to various embodiments of the invention. In the activated stateof functionality, the data in the optical data layer is readable by thelaser. In other words, the optical article may be read without any noiseor disturbances, which may otherwise have been present in thepre-activated state.

When an optical article goes into an “activated state”, a measuredoptical parameter changes from its first optical value to a secondoptical value where the change in optical value results in a change inthe error state of a sector or multitude of sectors on a disc. Thevariety of optical signals include those that affect the readout fromthe disc. These signals are layer reflectivity, that includes single ordual layer reflectivity, refractive index, in-plane birefringence,polarization, scattering, absorbance, thickness, optical pathlength,position, and any other affecting the signals. The nature of thesesignals originates from the several intrinsic light parameters thataffect the signal measured by the detector assembly of the optical discreader. These intrinsic light parameters include light intensity,directionality, polarization, and phase.

The change in optical properties of the optical article upon exposure toan energy source, e.g., from the activation system, can appear in anymanner that results in the optical data reader system receiving asubstantial change in the amount of energy detected. For example, wherethe dye is initially opaque and becomes more transparent upon exposure,there should be a substantial increase in the amount of light reflectedoff of the storage layer and transmitted through the content accesslayer and the optional optically transparent layer. Most dye compoundstypically change (reduce) the amount of incident radiation detected bymeans of selective absorption at one or more given wavelengths ofinterest (corresponding to the type of electronic storage device datareader system energy source). However, energy absorbance by the dyecompound is not the only way to effect an optical property change.

Most optical article reader system detectors are specifically designedto detect at least a certain intensity of radiation, reflected at anarrow set of wavelengths and/or frequencies surrounding the emittedwavelength(s) and/or frequency(ies), and usually in a particularpolarization state. Therefore, besides absorbing the incident energywavelength(s), the dye compound(s) and/or the dye composition mayadditionally or alternately accomplish any one or more of the following:change the polarization state of the incident energy; alter thefrequency/wavelength of the incident energy; change the path of theincident energy, whether through reflection, refraction, scattering, orother means such that some portion of the energy is directed (and/orreflected off of the storage layer) away from the electronic storagedevice data reader system detector. For instance, in optical readers forDVDs (specifically for the DVD-5 format), the detector will typicallyread an error at least about 90% of the time when less than about 20% ofthe incident laser light reaches the detector, and the detector willtypically read an error at least about 99% of the time when less thanabout 10% of the incident laser light reaches the detector. However, thedetector will also typically read an error less than about 2% of thetime when at least about 45% of the incident laser light reaches thedetector. Thus, any dye compound/composition that can be alternatedbetween these extremes of opacity and transparency at the given incidentwavelength(s) upon exposure to energy of the same incident wavelength(s)is appropriate for use in content access layers, as described herein.

In certain embodiments, the convertible element may render an opticalstate change from the pre-activated state to the activated state. Theoptical change may include a change in an optical property, such asreflectivity, single layer reflectivity, dual layer reflectivity,refractive index.

In certain embodiments, the difference between the optical signals fromat least a portion of the optical data layer in the pre-activated stateof functionality and the activated state of functionality is at leastabout 15 percent. For example, the difference in the percentreflectivity values or the percent transmittance values of at least aportion of the optical article for an incident laser in the activatedversus the pre-activated states may be at least about 15 percentagepoints. In the activated state, the reflectivity may be 15 percentagepoints higher or lower, or the transmittance may be 15 percentage pointslower or higher, with respect to their respective values in thepre-activated state.

In embodiments where the optical article includes a DVD, thepre-activated state of functionality is characterized by an opticalreflectivity of at least a portion of the optical article being lessthan about 45 percent. In these embodiments, the data in the opticaldata layer of the optical storage medium is not readable or is onlypartially readable in the pre-activated state. It should be appreciatedthat any portion of the optical article that has an optical reflectivityof less than about 45 percent may not be readable by the player. In someembodiments, the optical reflectivity of at least a portion of theoptical article in one of the pre-activated or the activated state maybe less than about 45, or less than about 20 percent, or less than about10 percent. Further, in other embodiments, the activated state ischaracterized by an optical reflectivity of at least a portion of theoptical article being more than about 45 percent. In some embodiments,the optical reflectivity of the optical article in both thepre-activated and activated states is more than about 45 percent, thatis, the optical article is readable in both the pre-activated and theactivated state. However, as noted above, in these embodiments theoptical article is readable only for a definite period of time in thepre-activated state and is readable for an indefinite period of time inthe activated state.

It should be appreciated that there are analogous predetermined valuesof optical properties for activating different optical articles. Forexample, for DVD-9 (dual layer) media, the specified (as per ECMA-267)minimum optical reflectivity is 18 percent to 30 percent and isdependent upon the layer (0 or 1). Alternatively, where the modifiedoptical property is birefringence of the optical substrate, thespecified maximum allowable birefringence for a playable DVD is 100 nm.Therefore, in a pre-activated DVD, the birefringence may be more thanabout 100 nm, or more than about 150 nm, or preferably more than about200 nm. In the activated state, the birefringence of the opticalsubstrate is less than 100 nm. Alternatively, where the modified opticalproperty is refractive index of the optical substrate, the specifiedrefractive index range for a playable DVD is 1.45 to 1.65. In oneexemplary embodiment, the refractive index of the optical substrate inthe pre-activated state is 1.65, more preferably 1.70 and even morepreferably 1.75. In the activated state, the refractive index of theoptical substrate is in a range from about 1.45 to about 1.65.

The convertible element may render the optical article partially orcompletely unreadable in the pre-activated state of functionality of theoptical article. In the pre-activated state, the convertible element mayact as a read-inhibit layer by inhibiting the laser from reaching atleast a portion of the optical data layer and reading the data on theoptical data layer. For example, the convertible element may absorb amajor portion of the incident laser, thereby impeding it from reachingthe optical data layer to read the data.

Upon interaction with one or more external stimulus, the opticalproperty of the convertible element may be altered to change thefunctionality of the optical article from the pre-activated state to theactivated state. For example, in the pre-activated state, theconvertible element may render the optical article un-readable bychanging the optical reflectivity of the optical article for theincident laser. However, the convertible element upon interaction withexternal stimulus becomes transparent to the wavelength of the laserused to read the optical article, thereby making the optical articlereadable in the activated state.

Alternatively, the convertible element may reflect the incident laserbefore the laser reaches the optical data layer. In this way, theconvertible element prevents the laser from reading the data in theoptical data layer. Upon interaction with the external stimulus, theconvertible element allows the incident laser to pass through, and reachthe optical data layer to read the data.

Alternatively, if an attempt is made to use the optical article in thepre-activated state, that is, if an attempt is made to use the opticalarticle without interacting the convertible element with an externalstimulus, the convertible element may render readability for only a setperiod of time to the optical article. For example, the convertibleelement may alter the reflectivity of at least a portion of the opticalarticle after the set period, such that the optical article becomespartially or completely unreadable, after the set period. In otherwords, the optical article may be readable only in certain portionsafter the set period of time. Alternatively, the optical article mayself-destruct after the set period of time limit. The self-destructionmay be initiated by, for example, exposure to elements, such as air orlight, or both, at room temperature. In this way, if the user takes out,for example, an optical storage medium from its packaging without firstgetting it exposed to the external stimulus, the optical storage mediumis exposed to such elements which render it unreadable. In some cases,upon exposure to room temperature elements, the optical article may beinitially readable, but subsequently self-destructs itself after a givenperiod of time.

The convertible element may be disposed in or proximate the opticalarticle in various forms. For example, the convertible element may bedisposed in a discrete area on the optical article, such as anindividual patch, a continuous layer extending across a portion of asurface of the optical article, or as a patterned layer extending acrossa portion of the optical article.

Alternatively, instead of being disposed on the surface of the opticalarticle, the convertible material may be disposed inside the structureof the optical article. In optical storage medium, the convertiblematerial may be disposed in the substrate on which the optical datalayer is disposed. In such an embodiment, the convertible material maybe mixed with the substrate material of the optical article. Inalternate embodiments, the convertible material may be disposed betweenthe layers of the optical article, or may be disposed within the layersof the optical article. In an exemplary embodiment, the convertiblematerial may be mixed with a polycarbonate to form the substrate for theoptical storage medium. As used herein, the term “polycarbonate” refersto polycarbonates incorporating structural units derived from one ormore dihydroxy aromatic compounds and may include co-polycarbonates andpolyester carbonates. It should be appreciated that these dyes should bethermally stable to withstand the molding temperatures of up to about380° C. of the optical article. Also, these dyes may preferably absorbthe wavelength of the laser in one of the activated, or thepre-activated state of the optical article. For example, dyes, such asacid blue 129, acid blue 45, acid blue 48, acid blue 74, acid blue 80,solvent green 3, disperse blue 3, disperse blue 134, disperse blue 14,basic blue 3, Indigo blue, solvent blue 2, solvent blue 4, solvent blue6, solvent blue 14, solvent blue 68, solvent violet 8, basic violet 4,solvent violet 38, acid black 48, may be mixed with the polycarbonate toform the substrate. Upon interaction with external stimulus, the dyepresent inside the substrate changes color. As a result, the substratemay become transparent to the laser light, thereby facilitating thetransmittance of laser light through the substrate and making theoptical article readable.

The convertible element may include a convertible material that changesoptical property in response to the external stimulus. For example, theconvertible material may include one or more of a color-shift dye, aphoto-chromic material, a photovoltaic material, a magnetic material, anelectro-chromic material, or a thermo-chromic material, amagneto-optical material, a photo-refractive material, a lightscattering material, a phase-change material, dye aggregates,nanoparticles. The color-shift dye may refer to a material, which maychange from a first color to a second color upon interaction with anexternal stimulus, such that the first color, second color, or both aretransparent to the incident laser. In some embodiments, the color-shiftdye may include a bleachable dye, which bleaches upon interaction withthe external stimulus, thereby becoming transparent to the incidentlaser. In some embodiments, the color-shift dye may darken uponinteraction with the external stimulus, thereby absorbing the incidentlaser light. In other embodiments, the color-shift dye may include anaryl carbonium dye, thiozine, spyropyran, fulgide, diarylethene, liquidcrystal, leuco dye, or a hydroquinone-based compound, or other suitablechemical compounds prepared by one skilled in the art.

The change in optical properties of the optical article upon exposure tothe external stimulus may result in the optical data reader systemreceiving a substantial change in the amount of energy detected. Forexample, there may be a substantial increase in the amount of lightreflected off of the optical data layer and transmitted through otherlayers, such as the content access layer and the optional protectiveouter coating, in the portions of the optical article where the materialof the convertible element is initially opaque to the incident laser andbecomes relatively transparent to the incident laser upon exposure tothe external stimulus. Most dye compounds typically change (reduce) theamount of incident radiation detected by means of selective absorptionat one or more given wavelengths of interest (corresponding to the typeof electronic storage device data reader system energy source). However,energy absorbance by the dye compound is not the only way to effect anoptical property change.

Most types of optical article reader system detectors are specificallydesigned to detect at least a certain intensity of radiation, reflectedat a narrow set of wavelengths and/or frequencies surrounding theemitted wavelengths and/or frequency, and usually in a particularpolarization state. Therefore, besides absorbing the incident energywavelengths, the convertible element, such as dye compounds and/or thedye composition may additionally or alternately accomplish any one ormore changes, such as change in the polarization state of the incidentenergy, change in the frequency/wavelength of the incident energy,change in the path of the incident energy, whether through reflection,refraction, scattering, or other means such that some portion of theenergy is directed (and/or reflected off of the optical data layer) awayfrom the electronic storage device data reader system detector. Forexample, in optical readers for DVDs (specifically for the DVD-5format), the detector will typically read an error at least about 90percent of the time when less than about 20 percent of the incidentlaser light reaches the detector, and the detector will typically readan error at least about 99 percent of the time when less than about 10percent of the incident laser light reaches the detector. However,typically the detector may also read an error less than about 2 percentof the time when at least about 45 percent of the incident laser lightreaches the detector. Thus, any dye compound/composition that can bealternated between these ranges of opacity and transparency at the givenincident wavelength upon exposure to energy of the same incidentwavelength is appropriate for use in content access layers.

The external stimulus that interacts with the convertible element mayinclude a laser, infrared radiation, thermal energy, infrared rays,X-rays, gamma rays, microwaves, visible light, ultra violet light,ultrasound waves, radio frequency waves, microwaves, electrical energy,chemical energy, magnetic energy, mechanical energy, or combinationsthereof. The interaction with the convertible element may includecontinuous, discontinuous, or pulsed forms of the external stimulus.

The external stimulus may be selected based on the kind of convertiblematerial. For example, when the convertible material includes acolor-shift dye, the external stimulus may be a light source ofappropriate wavelength and power to make the color-shift dye transparentto the laser, thereby changing the functionality of the optical articlefrom an un-readable state to a readable state. Further, the power of thelight source is sufficient to bleach the color-shift dye. Additionally,the composition of the color-shift dye, as well as the specifications ofthe power source may be tailored based upon the factors, such ascolor-shift dye concentration in the convertible material, thickness ofthe coating of the color-shift dye, or concentration of co-factors orcatalysts for the process. In an exemplary embodiment, the convertiblematerial may include organic or inorganic additives in combination withthe color-shift dye. These additives may absorb the external stimulus,such as infrared radiation. In an exemplary embodiment, this absorptionof the external stimulus by the additives may result in temperaturechange of the additives. This temperature change may cause local heatingin the color-shift dye, thereby making the color-shift dye transparentto the incident laser.

Further, the color-shift dye, such as a photo-bleachable dye, may alsobe interacted with ultraviolet (UV) light. The wavelength of the UVlight may be in a range from about 190 nm to about 400 nm. In anotherexample, visible light having a wavelength in a range from about 400-800nm may be used to interact with the convertible material to change thestate of functionality of the optical article. However, thephoto-bleachable dyes may be enabled to absorb the radiation of theincident laser initially. It should be appreciated that the wavelengthof the incident laser, i.e, the laser light used to read the opticalarticle is about 780 nm for a CD, about 650 nm for a DVD, about 405 nmfor an HD-DVD or a Blu-ray. Hence, the optical article having thephoto-bleachable dye may be unreadable in pre-activated state. Butbecomes readable when the dye is made to interact with sunlight ornormal room light prior to interacting it with the external stimulus foractivating the optical article. UV light may also be used when the dyeis combined with photocatalytic additives, such as titaniananoparticles. For example, one or more photo-bleachable dyes, such asmethylene blue, polymethine dye, or malachite green may be exposed to UVlight individually or in combination with titania nanoparticles.

In an exemplary embodiment, the reflectivity of the optical article maybe reduced to less than 10 percent by depositing a layer having amethylene blue (MB) precursor, such as benzoyl leuco methylene blue(BLMB) in a resin matrix. The formation of MB is triggered by exposureto oxygen and the layer bonds with the optical article in the process.Alternatively, a photosensitive layer may be formed on the opticalarticle by employing aryl carbonium dye precursors such as crystalviolet lactone, in combination with photo acid generators (PAG), or arylcarbonium dyes may be used separately to reduce the reflectivity of theoptical article. Additionally, colorants may be mixed with these dyes toprotect against photo-bleaching with a light source having a broadspectrum of wavelengths and also to limit the amount of dye that needsto be bleached. This facilitates activation of the optical article in aminimum amount of time, thereby adding cost advantage.

Alternatively, an adhesive may be employed as a convertible material.The bond strength of the adhesive may be altered upon interaction withthe external stimulus. For example, in the pre-activated state, anelement, such as a detachable label, which is opaque to the incidentlaser, may be coupled to a portion of the optical article by employingthe adhesive. Subsequently, upon interaction with the external stimulusthe adhesive may lose some or all of its bond strength, therebyfacilitating the de-coupling of the element from the optical article,thereby making the optical article readable in the activated state.

Alternatively, one or more thermo-chromic materials may be employed as aconvertible material. The thermo-chromic material may be disposed on theoptical article in various forms, such as a discrete portion, acontinuous film, or a patterned film. During authorization, thethermo-chromic material may be heated using sources such as infraredlamps, laser radiation, Nichrome wire, or by electrical coil, which maybe in direct contact with the convertible element or may radiatively orconductively conduct heat to at least a portion of the convertibleelement. Alternatively, the thermo-chromic material may be subjected toa pulsed thermal energy, such as short single pulses, to render changein the optical property of the thermo-chromic material such that theincident laser may pass through the thermo-chromic material and reachthe optical data layer. For example, when the thermo-chromic material isemployed in the form of a coating, in a discrete portion, or a pattern,or a continuous layer, the heat may change the color of thethermo-chromic material of the coating and make it transparent to thelaser light. In another exemplary embodiment, a non-cured layer orpartially cured layer of the convertible material may be cured bysubjecting it to infrared radiation and/or a catalyst to make theoptical article readable.

In an exemplary embodiment, the chemically sensitive dyes may beemployed as convertible material. These dyes may be chemically changedto alter the functionality of the optical article. For example, a pHsensitive dye may be mixed with a volatile amine and a resin to form acoating on the optical article. Consequently, when the optical articleis subjected to heat, the amine layer evaporates in the presence ofheat, thereby decreasing the pH and increasing reflectivity of thearticle. Additionally, the resin may be modified to facilitate heatgeneration to change the pH value of the dye.

In addition to dyes, the convertible material may include particles thatabsorb the laser that is used to read the optical article. Duringauthorization, the optical article may be exposed to a predeterminedlaser (which has a wavelength other than the incident laser that is usedto read the optical article), which may melt or dissolve these particlesso that the incident laser may reach the optical data layer and make theoptical article readable in the activated state.

In another exemplary embodiment, the dye may be such that it may bebleached under a vacuum ultraviolet (UV) light source. It should beappreciated that vacuum UV includes a light having a wavelength equal toor less than 190 nm. A vacuum UV light source produces radiation thatincludes a spectral range of 190 nm and less. In a normal environment,such as in a house, where oxygen is present in the atmosphere, theatmosphere substantially absorbs light below 190 nm. Thus, any lightsource emitting a light in the wavelength of 190 nm and below will notbe able to activate the optical article. In this embodiment, duringauthorization at a location, such as a point-of-sale location, theoptical article may be sealed in a container that has an atmosphere thatis free of oxygen and has a light source that emits light in awavelength of 190 nm and below.

Alternatively, the convertible material may include a UV sensitivephoto-refractive polymer or a phase change material. The convertiblematerial may either be disposed on the surface of the optical article orbe present in the bulk of the optical article. Further, a gratingpattern is imaged in the convertible material to impede the readabilityof the optical article. At a point-of-sale location the optical articlemay be optically flooded to erase the grating and make the opticalarticle readable.

In an alternate embodiment, the convertible material may contain a phasechange material in which the form of the phase change material can beinterchanged between amorphous and crystalline by heating. In one form,such as a crystalline form, the layer inhibits the laser from reachingthe optical article, thereby making it unreadable. Whereas, in anotherform, such as an amorphous form, the convertible material renders theoptical article readable. For example, the convertible material mayinclude a chalcogenide, which may be changed from the crystalline stateto an amorphous state, and vice versa, by employing a high power laser.Alternatively, the convertible material may include a material that mayswitch between two or more molecular states with each molecular statehaving a signature color. The material may be transformed from onemolecular state to another by varying parameters such as incident light,or pH, or both.

Further, the convertible material may include convertible material, suchas photo-chromic dyes, that may to undergo a change from a first form tothe second form when exposed to external stimulus, such as light of apredetermined wavelength. For example, exposure to light may result in achange in chemical structure by the opening or closing of certain bondswithin the chemical structure of the material. In these embodiments, thedye may absorb the wavelength of the incident laser (for example, 650 nmfor a DVD) in one of the first or second forms and not in the otherform. This way, the optical article is unreadable when the convertiblematerial is in one of the first or second forms, but is readable whenthe convertible material is in the other form. Examples of suchconvertible material may include silver halides, diarylethenes,fulgides, spiropyrans and their derivatives, crystal violet lactone,polymethine dyes, anthraquinone dyes, azulenium dyes, thiozine dyes suchas methylene blue, tellurium oxide, chalcogenide materials, metalazides, isomerizable dyes such as derivates of azobenzene derivatives,and liquid crystals. In other embodiments, where the wavelength of theincident laser may be about 405 nm or about 532 nm, nitrones, ornitrostilbenes based dyes may be employed in the optical article.

Examples of photo-chromic dyes which may undergo a change from a firstform to the second form may include spyropyrans such as1-(2-Hydroxyethyl)-3,3-dimethylindolino-6′-nitrobenzopyrylospiran, 3,3trimethylindolinobenzopyrylospiran,1,2-Bis[2-methylbenzo[b]thiophen-3-yl]-3,3,4,4,5,5-hexafluoro-1-cyclopentene,2,3-Bis(2,4,5-trimethyl-3-thienyl)maleic anhydride,2,3-Bis(2,4,5-trimethyl-3-thienyl)maleimide. Other examples can be foundin E. Fischer, Y. Hirshberg, J. Phys. Chem., 1952, 4522; G. H. Brown,“Techniques of Chemistry, Vol. III, Photochromism”, Wiley-Interscience(1971); S. Irie, T. Yamaguchi, H. Nakazumi, S. Kobatake, M. Irie, Bull.Chem. Soc. Jpn., 72, 1139 (1999); M. Irie, Chem. Rev., 100, 1685 (2000)which is incorporated herein by reference. Other examples includespyropyrans such as1-(2-Hydroxyethyl)-3,3-dimethylindolino-6′-nitrobenzopyrylospiran,1,3,3-Trimethylindolinobenzopyrylo-spiran,1,3,3-Trimethylindolino-6′-bromobenzopyrylospiran,1,3,3-Trimethylindolino-8′-methoxybenzopyrylospiran1,3,3-Trimethylindolino-β-naphthopyrylospiran,1,3,3-Trimethylindolinonaphthospirooxazine, and1,3,3-Trimethylindolino-6′-nitrobenzo-pyrylospiran. Photochromicdiarylethenes includecis-1,2-Dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl)ethane,1,2-Bis[2-methylbenzo[b]thiophen-3-yl]-3,3,4,4,5,5-hexafluoro-1-cyclopentene,2,3-Bis(2,4,5-trimethyl-3-thienyl)maleic anhydride, and2,3-Bis(2,4,5-trimethyl-3-thienyl)maleimide.

Examples of photo-bleachable dye compositions may include dyes withelectron donors with polymer matrices. It is preferable that thesecompositions be coated adjacent to the optical data layer rather than bedoped into the polycarbonate substrate. In certain embodiments, thecompositions may include one or more of xanthene, thiozine, or oxazinedyes such as methylene blue, toluidine blue, erythrosine B, and eosin Y.Examples of electron donors include organic amines such as triethanolamine, n-phenylglycine, borate salts such as triphenyl-n-butyl boraten-butyrylcholine. Examples of polymer matrices may include, but are notlimited to, one or more of polyacrylates such as oligomeric methylmethacrylates, such as Elvacite® 2008, poly(methyl methacrylate)s and/orammonio methacrylates, such as EUDRAGIT®, poly(alkyl acrylate)s, such aspoly(methyl acrylate), poly(alkacrylate)s, poly(alkyl alkacrylate)s,such as poly(ethyl methacrylate) and the like, poly(vinyl alcohol)and/or oligomeric vinyl alcohols, polyvinylpyrrolidone, polyvinylacetate, polystyrene, polyhydroxy styrene, and the like, andcombinations or copolymers thereof.

In another exemplary embodiment, a magneto-optic material is disposedover a portion or the entire surface of the optical article to make theoptical article unreadable in the pre-activated state. Subsequently, theoptical article is subjected to a combination of electromagneticradiation and a magnetic field to locally heat areas having themagneto-optic material past the Curie point to render the opticalarticle readable.

In an exemplary embodiment, a magneto-optical layer may be disposed atthe surface of the optical article. This magneto-optical layer ispolarized so as to distort the reflected signal from the incident laserto make the optical article un-readable in the pre-activated state.Subsequently, during authorization, the layer is de-polarized byapplying magnetic fields. Alternatively, the optical article may includea ferro-magnetic thin film disposed thereon. The optical article may bereadable upon interacting with a magnetic field. For example, magneticnanoparticles may be distributed throughout the optical article andlocked or confined in their positions in the pre-activated state.Subsequently, upon activation, all the magnetic nanoparticles may bedirected to a particular location, for example, around the inner hub ofthe optical article to make the optical article readable.

Further, patterns, such as patches or stripes having birefringenceproperties may be disposed on the optical article. These patterns may bereset by exposure to radial magnetic field, thereby making the opticalarticle readable. Alternatively, a metal oxide layer is disposed on theoptical article. The metal oxide (MO) layer is not aligned or partiallyaligned in the pre-activated state of the optical article. That is, themagnetic field of the MO layer is random. In the activated state, the MOlayer is aligned by, e.g., applying a magnetic field. Additionally,nanoparticles may be employed in the MO layer to generate heat via eddycurrents. It should be appreciated that application of an electric fieldwhile heating facilitates alignment of the MO layer, thereby making theoptical article readable.

In a mechanical arrangement, the convertible element may include amaterial, such as a polymer bead, may be employed around the inner hubof the optical article. In certain embodiments, this material may weldthe optical article to the packaging unless disabled at thepoint-of-sale location.

In another embodiment, the convertible element of the optical articleincludes a release liner that is undercoated with an uncured monomerlayer that has a refractive index matching to that of the opticalarticle. In this embodiment, the convertible element may be disposedwithin the substrate of the optical article. The optical article maycontain engineered marks, such as scratches, on the surface, which maybe cured or filled upon interaction of the optical article with theexternal stimulus. For example, the monomer in the convertible elementmay fill in the marks. The release liner is subsequently cured whileauthorizing the optical article, for example, at the point-of-salelocation. However, if left uncured, the release liner pulls off themonomer back from marks, thereby leaving the optical article unreadable.Alternatively, a substance adapted to etch the optical article if leftuncured may be employed in the release liner.

In embodiments of the invention, the optical article, such as an opticalstorage medium may be disposed in a packaging. The packaging may bemodified to allow an external stimulus to be directed toward thematerial of the convertible element. For example, the external stimulusmay be directed toward the convertible material to be bleached byemploying a window that is transparent to the external stimulus, whilethe rest of the portion of the packaging may be semitransparent oropaque to the external stimulus. Alternatively, the whole portion of thepackaging may be transparent to the external stimulus. By employing themodified packaging, the optical article may be authorized at the pointof authorization, such as a point-of-sale, or an issuance counter of astore. This way the authorization process may be performed whilemaintaining the optical article in the packaging, thereby making theauthorization process more efficient and time saving.

Referring now to FIG. 1, the optical storage medium 10 includes a datastorage region 12 and an inner hub 14. The data storage region 12includes an optical data layer 20 (FIG. 2), which stores the data,whereas the inner hub 14 is the non-data storage region of the opticalstorage medium 10. The optical storage medium 10 has a convertibleelement disposed on the data storage region 12 in the form of a film 16in the pre-activated state of the optical storage medium 10. The film 16includes a convertible material, such as a bleachable dye. Theconvertible material may interact with an external stimulus, such asradiation of a predetermined wavelength range. The optical storagemedium 10 upon interaction with the external stimulus undergoes anoptical state change, whereby a property or characteristic of theconvertible material is altered, thereby changing the state offunctionality of the optical storage medium 10. For example, in thepre-activated state of the optical storage medium 10, the convertiblematerial of the film 16 may be opaque to the incident laser that is usedto read the optical storage medium 10. That is, in the pre-activatedstate the convertible material may inhibit the incident laser fromreaching the optical data layer 20, whereas after interacting with theexternal stimulus the convertible material may become transparent to thewavelength of the incident laser. As noted above, this change in theoptical state may be caused by chemical changes within the convertiblematerial, which are caused by exposure to the external stimulus. Thefilm 16 may cover at least a portion of the optical storage medium 16.In the pre-activated state, the optical storage medium 16 may beunplayable or unreadable at least in the portions where the film 16 isdisposed. In other words, the optical storage medium 16 has areflectivity of less than about 45 percent, or preferably less thanabout 20 percent, or more preferably less than 10 percent in theportions where the film 16 is disposed.

FIG. 2 illustrates a cross-sectional side view of the optical storagemedium 10 of FIG. 1. In a simplified illustration of the optical storagemedium 10, the optical storage medium 10 includes an optical data layer20 disposed on a substrate 22. The substrate 22 may include apolycarbonate material. The substrate 22 may include a convertiblematerial, such as the convertible material of the film 16. The opticaldata layer 20 is protected by employing a capping layer 24. It should beappreciated that the capping layer 24 is transparent to the wavelengthof the incident laser, which is used to read the data stored in theoptical article 10. The capping layer 24 may prevent the optical datalayer from exposure to environmental elements, such as air, oxygen,moisture, which may react with the optical data layer and cause anyundesired changes, such as oxidation of the optical data layer. Also,the capping layer 24 may prevent mechanical damages to the surface ofthe optical data layer 20. For example, the capping layer may be scratchresistant. Further, the optical storage medium 10 includes the film 16of the convertible material, which is disposed on the capping layer 24.

FIG. 3 illustrates an optical storage medium 26 having a convertiblematerial disposed thereon in discrete portions 28 in the pre-activatedstate of the optical storage medium 26. The portions 28 are disposed inthe data storage region 30 surrounding the inner hub 32. The opticalstorage medium 26 may have an optical reflectivity of less than 45percent in these portions 28. Therefore, the optical storage medium 26may not be readable in these portions 28. In some embodiments, fewerthan all of the discrete portions 28 may include convertible material.In these embodiments, the portions having the convertible material aremade to interact with the external stimulus to change the state offunctionality of the optical storage medium 26.

Turning now to FIG. 4, a simplified structure of an optical article,such as an identification (ID) card 34 is illustrated. As with theoptical storage media 10 and 26, the ID card 34 includes an optical datalayer 36 for storing data. The ID card 34 further includes a substrate38 on which the optical data layer 36 is disposed. The substrate 38 mayinclude a polycarbonate material. In an exemplary embodiment, thesubstrate 38 may include the convertible material that may change anoptical property upon interaction with the external stimulus, therebychanging the state of functionality of the card 34. The optical datalayer 36 is protected by a capping layer 40. As with the substrate 38,the capping layer 40 may also include a polycarbonate material. As notedabove with regard to the capping layer 24, the capping layer 40 may beused to protect the optical data layer 36 from chemical and/ormechanical damages. The ID card 34 includes a convertible materialdisposed on the surface 41 of the capping layer 40 in the form of a film42. In the pre-activated state, the film 42 may prohibit the incidentlaser from reaching to the optical data layer 36 and reading the datastored therein. However, after interaction with the external stimulus,the film 42 may allow an incident laser to pass through and reach theoptical data layer 36, thereby allowing the reader to read the datastored in the optical data layer 36 of the card 34. The ID card 34 maybe exposed to the external stimulus before issuing the ID card 34 to theconcerned authority, thereby rendering the data in the optical datalayer 36 readable by the incident laser. By protecting the data in thismanner before issuance of the ID card 34 to the concerned authority, theundesirable use of the card may be prevented in the event the card isstolen from the store where the card was stored prior to issuance. Thefilm 42 may be disposed in different forms on the surface of the cappinglayer 40. For example, the film 42 may extend across a portion of thecapping layer 40, or may form a patterned layer extending across aportion of the capping layer 40, or may form a continuous film, such asfilm 42, on the capping layer 40.

As described with regard to FIGS. 1-4, the convertible element rendersthe optical article completely or partially unreadable in thepre-activated state of the functionality by changing the reflectivity ofthe optical article at certain locations. In the activated state offunctionality of the optical article, the properties of the convertibleelement are changed from those in the pre-activated state by interactingthe optical article with the external stimulus, as will be describedbelow. Therefore, the optical article is ineffective in thepre-activated state.

FIG. 5 illustrates a method of changing the state of functionality of anoptical article, such as an optical storage medium 46. Although theillustrated embodiment of FIG. 5 is represented with regard to theoptical storage medium 46, the method may be employed to change thefunctionality of other optical articles, such as an ID card, a paymentcard, a personal information card, and the like. As illustrated, theexternal stimulus 44 interacts with the convertible element disposed indiscrete portions 48 of the optical storage medium 46. The externalstimulus 44 may be, for example, a laser, infrared radiation, a thermalenergy, infrared rays, X-rays, gamma rays, microwaves, visible light,ultra violet light, ultrasound waves, radio frequency waves, microwaves,electrical energy, chemical energy, magnetic energy, mechanical energy,or combinations thereof. The optical storage medium 46 includes a datastorage region 50 and an inner hub 52.

The optical properties of the convertible material are altered uponinteraction with the external stimulus 44, thereby increasing theoptical reflectivity of the optical article for the incident laser inthe portions 48, to make the optical storage medium 46 transparent tothe incident laser the portions 48. In some embodiments, the externalstimulus 44 may be generated by an excitation source (not shown) thatmay generate radiation in a predetermined wavelength range.

FIG. 6 illustrates an optical article, such as an optical storage medium54, having a data storage region 56 and an inner hub 58. The opticalstorage medium 54 includes a convertible material disposed in discreteportions 60 on the optical storage medium 54. The optical storage medium54 is stored inside a packaging 62. The packaging 62 may direct anexternal stimulus towards the portion 60 through a window 64 that isaligned with at least a portion of the convertible material. In theillustrated embodiment, the rest of the area 66 of the packaging 62,other than the window 64, may not be transparent to the externalstimulus, and therefore may not participate in directing the externalstimulus 44 from outside the packaging 62 toward the portions 60.

FIG. 7 illustrates a method of changing a functionality of an opticalarticle, such as optical storage medium 68. The method may be appliedfor other optical articles, such as an ID card, a payment card, apersonal information card, and the like. As illustrated, the opticalstorage medium 68 includes a data storage region 72 having a convertibleelement disposed in discrete portions 70. The optical storage medium 68also has an inner hub 74. When inserted in an optical reader 76 prior todirecting an external stimulus on it (pre-activated state), the opticalstorage medium 68 does not play, that is, the data in the optical datalayer (not shown) of the optical storage medium 68 is unreadable (block78). However, when interacted with an external stimulus 80, theconvertible element alters the functionality of the optical storagemedium 68 (activated state) as described above and renders it readableby the reader 76 (block 82).

FIG. 8 illustrates a method of transaction of an optical article havinga convertible material. At block 84, an optical article having aconvertible element is received for transaction. The transaction may becarried out at a location, such as a point-of-sale of a shop from wherethe optical article is being purchased, or a storage location in aworking place, where the authorization of the optical article isnecessitated prior to being issued to the user. It should be noted thatfor simplicity throughout the application the term “point-of-sale” isused to represent any location where the authorization of the opticalarticle takes place to make it available to the user, such as acustomer. At block 86, the transaction for the optical article isreceived. The transaction may either include a monetary transaction orverification of the user receiving the optical article. For example, ata point-of-sale of a shop, the transaction may include a monetarytransaction, whereas in an office premises the transaction may includeverification of the user receiving the optical article.

At block 88, the optical article is authorized for use, that is, thestate of functionality of the optical article is changed from apre-activated state to the activated state at a location, such aspoint-of-sale. Accordingly, if the optical article is taken without aproper transaction being conducted, the optical article will either notbe readable or may be readable only for a definite period of time. Forexample, the definite period of time of an optical article which is notactivated may range from about 8 hours to about 72 hours, which is muchless than the typical life of the optical article. The authorization ofthe optical article may be done in several ways at the authorizationlocation. For example, the optical article may be authorized by exposingthe optical article to a light source having a predetermined power andemitting a light of predetermined wavelength range by placing theoptical article with or without the packaging in a container having thelight source. In this embodiment, the packaging may have a window asdescribed in FIG. 6 and the light may be directed to at least a portionof the convertible element through the window.

Additionally, in case of fewer than all of the discrete portions of theoptical article having the convertible element, the discrete portionsnot having the convertible element may be made such that if interactedwith the external stimulus they will render the optical article at leastpartially unreadable. In these embodiments, only the seller will beaware of the location of the discrete portions having the convertibleelement, which needs to be interacted with the external stimulus torender the optical article playable.

The discrete portions that may render the optical article at leastpartially unreadable upon interaction with the external stimulus may bereferred to as control block sectors. However, the control block sectorsmay also render the optical article readable upon interaction with theexternal stimulus. The size of the control block sectors may be a fewmillimeters on an optical article, such as an optical storage medium. Inembodiments where the control block sectors render the articleunreadable after interaction with the external stimulus, when theincident laser employed to read the optical article comes across thesecontrol block sectors, the control block sectors may lead the incidentlaser to points in the data layer which may not permit the opticalarticle to be read by the incident laser. This may be accomplished bycreating errors, such as a tailored menu. For example, the menu logic ofa tailored menu may be altered based on whether those control blocksectors are readable. Accordingly, the tailored menu may be authoredsuch that the optical article may boot to a menu which allows completereading of the entire data set on the optical article if the controlblock is readable. Alternatively, when the control block sectors renderthe optical article readable after interaction with the externalstimulus, the optical article may be authored to boot to an alternatemenu that disallows reading of the contents if the control block isunreadable. In another embodiment, the tailored menu may be authoredsuch that when the incident laser comes across the control block havingthe tailored menu, the reader or the player will display a messageindicating to the user that the optical article is not authorized. Inthe pre-activated state, the optical article is authored in a way suchthat when the control block is readable, it directs the reader to a menuthat does not enable reading of the optical article. Whereas, during theactivated state, the activation process destroys (creates errors) at thecontrol block such that when the activated optical article is read, thecontrol block is unreadable and the reader is directed to a menu thatallows reading of the optical article.

In embodiments where the optical article includes a control blocksector, a metallic foil, such as aluminum layer, may be disposed on theoptical article. Depending on the position of the foil layer, thereflectivity of the incident laser may be affected in the presence ofthe foil layer. The foil layer is disposed such that it covers thesurface of the optical article leaving the portion having the controlblock sectors uncovered. Accordingly, when the optical article issubjected to external stimulus, such as RF radiation, the control blocksectors may be destroyed while the foil layer protects the portionscovered thereby. Subsequently, the foil layer may be removed by applyinga magnetic field to lock the foil layer in a desirable position where itwould not obstruct the path of the incident laser used to read theoptical article, and the optical article may be read by the incidentlaser. Portions of the optical article that were destroyed by theexternal stimulus will not be readable by the incident laser.

A tailored menu may be located in the optical data layer of the opticalarticle. It should be appreciated that in an optical storage medium, theincident laser first reads the data of the files located near the centerand subsequently reads the data toward the outer rim, until a validoptical signal is returned to the reader. This optical signal allowstrack-following-servos to lock on to the data layer, and then thedigital decoder begins reading the data. Accordingly, the incident lasermay first read the data stored in the areas/files located close to theinner hub of the optical storage medium. These files may contain a menu,such as a startup menu that may facilitate the player/reader to skip tocertain sections of the optical storage medium. In some embodiments, theplayer reads these files and displays the menu on a screen for theviewer to choose from.

In one embodiment, the first valid or readable file that the player mayencounter when scanning from the inner hub outward is the tailored menu.This tailored menu may be such that, the tailored menu may disallow theincident laser to scan further, or may not allow the user to go anywhereexcept back to the start up menu. In such embodiments, the displayedmessage may be, for example, “This optical storage medium has not beenauthorized”. Additionally, the optical storage medium may also include asecond menu, or a valid menu, which is the menu that upon interactionwith the incident laser may render the optical storage medium readable.That is, if the incident laser encounters this menu, then the opticalstorage medium will play normally. In the activated state, the firstfile that the incident laser may find is the normal menu file, and theoptical storage medium plays normally. Whereas, if the disk has not beenactivated, the tailored menu is encountered by the incident laser, andthe optical storage medium may not play.

In certain embodiments, the optical storage medium may include atailored menu in combination with one or more convertible elements, suchas a dye, an RF circuitry, or an electro-chromic structure. The tailoredmenu may be in operative association with one or more convertibleelements, such that when the optical article is exposed to an externalstimulus, the convertible elements may react with the external stimulusand make the tailored menu unreadable for the incident laser. That is,as a result of interaction of the convertible element with an externalstimulus, the convertible element may render that particular portion ofthe optical data layer having the tailored menu unreadable.

For example, when the tailored menu is employed in combination with aradiation sensitive convertible material, for example, an RF ormicrowave sensitive convertible material, the optical data layer beneaththe portion of the optical article having the tailored menu may becoated with the radiation sensitive convertible material. As a result ofinteraction with the radiation, the radiation sensitive convertiblematerial may become opaque to the incident laser, thereby preventing thetailored menu from being read by the incident laser. Hence, the opticalarticle may be rendered readable.

When used in combination with an RF circuitry, RF or microwave radiationmay be used to activate the optical storage medium. In an exemplaryembodiment, the RF circuitry may include an RFID tag. The RFID tag uponreaction with external stimulus, such as the RF or microwave radiation,may produce thermal or electrical energy, which may then react with aconvertible element disposed on a portion of the optical data layerhaving the tailored menu and render the optical data layer in thatparticular portion opaque to the incident laser. Alternatively, theoptical storage medium may employ an electro-chromic structure and thetailored menu in combination with two resonant circuits, one with a highQ value and one with a low Q value, both resonant at about the samefrequency. The two resonant circuits may be employed in the inner hub ofthe optical storage medium. The two resonant circuits may be inductivelycoupled to an external radiation source, such as an RF or microwaveradiation source. A radiation of the proper frequency and field strengthmay create an electrical signal in the high Q circuit and not the low Qcircuit. The electrical signals from the two coils may interact with theelectro-chromic structure to render it opaque to the incident laser. Ifthe field strength is too high, then both circuits will not generateelectrical signals that modify the electro-chromic layer. If the fieldstrength is too low, then both circuits will not generate electricalsignals that modify the electro-chromic layer. If the frequency is notat resonance, then both circuits will not generate electrical signalsthat modify the electro-chromic layer.

When used in combination with an electro-chromic structure, theelectro-chromic structure may be in operative association with aconverter, and may be disposed within the structure of the opticalstorage medium. The converter may convert RF or microwave radiation intoelectrical signal. Further, a conductive material may be disposed on theentire or a partial surface of the optical storage medium while leavingthe portions of the data storage region where the underneath opticaldata layer employs the tailored menu. The optical storage medium maythen be interacted with an external radiation, such as RF or microwaveradiation, which may make the portion of the optical data layer havingthe tailored menu, opaque to the incident laser. Alongside, the externalradiation may interact with the converter to produce electrical signals,which may then interact with the electro-chromic structure to render theoptical article readable in the activated state.

Alternatively, for the optical articles employing tailored menus, theelectro-chromic structure may be coupled to, and in operativeassociation with, the portion of the optical data layer having thetailored menu. In these embodiments, the electro-chromic structure maybe converted into an opaque structure upon interaction with an externalradiation at the time of authorization, thereby making the opticalarticle readable. The electro-chromic structure may convert into atransparent structure, if interacted with radiation other than the oneused for authorizing the optical article. This way, an un-authorizeduser may not be able to guess and authorize the optical article.

The convertible material in the optical article may contain a dye layerwith a saturable absorber or a threshold material that is bleachablewith an incident laser. It should be appreciated that a thresholdmaterial may be bleached by an incident laser having a power over acertain threshold value. Since there is ample radiation (UV, visibleradiation or heat) in sun light, an un-authorized user, such as ashoplifter, may use the radiation from the sun light to activate theoptical article. Therefore, the dye having a nonlinear thresholdcharacter may have a tailor-made incident radiation power to render theoptical article readable. For example, the convertible material may besuch that when the radiation power is lower than the threshold, nothinghappens. Thus, the threshold character not only blocks the shoplifter,but also makes the optical article immune to the day light radiation inthe shop or shipment. On the contrary, if the radiation is too high, theoptical article absorbs too much energy and is rendered un-readable.However, a predetermined window of radiation power activates the opticalarticle and renders it readable. For example, metallophthalocyanine(MPC) or fullerene (C60) is added to the photo or thermal bleachabledye. MPC and C60 are each a reverse saturate absorber material (RSA)which absorbs energy only when the radiation having the wavelength 532nm reaches a certain predetermined power. It should be appreciated thatthe material of the substrate of the optical article, such aspolycarbonate, is usually a poor heat conductor. Hence, when thepolycarbonate strongly absorbs radiation, it increases the localtemperature, where thermal bleachable dye locates. If the incident poweris too high, the optical article may be damaged. The threshold iscontrolled by the concentration of the dye.

The source for external stimulus may be inbuilt in the bar code reader,a radio frequency identification reader, an electronic surveillancearticle reader, like an acousto-magnetic tag detector or de-activator,such that when the optical article or the packaging having the opticalarticle is swiped through the bar code reader, the convertible elementis allowed to interact with the external stimulus and the state of theoptical article is converted to the activated state. Further, the sourceof the external stimulus may also be integrated with a hand-held wand orcomputer controlled light boxes at the aisles. It is desirable to havelight sources that have a power and/or wavelength of the light which isnot commonly available, specifically to defaulting users, such asshoplifters or thieves.

Additionally, the verification of the activation may be conducted on theoptical article. The verification may be desirable either to: 1)identify the defaulting users, or 2) to confirm that the optical articlewas accurately activated at the first point of interaction, such as apoint-of-sale. In some embodiments the verification may be conducted atthe second location, such as the exit point of the storage location inoffice premises, a shop, or a store, that is to say, the activation ofthe optical article may be conducted just before the user leaves thepremises of the shop or mall. In these embodiments, the security systeminstalled at the exit locations may send out signals indicating whetheror not the optical article is activated. Further, a device may beinstalled in the security system, such that the device may interact withthe convertible element in the optical article and make it permanentlyunreadable if the optical article was carried out without beingactivated.

As will be described in detail below, the material of the convertibleelement may be in operative association with one or more devices, suchthat the devices may receive energy from the external stimulus in oneform and convert it into another form. The converted form of energy isthen utilized by the convertible material to change the state offunctionality of the optical article. For example, the convertiblematerial may be in operative association with radio frequency (RF)circuitry, which may react with an external stimulus, such as radiofrequency waves, or microwaves, and convert it into thermal energy. Thisthermal energy may then be utilized by the convertible material tochange the functionality of the optical article from the pre-activatedstate to the activated state, as will be described in detail below withregard to FIGS. 9-13.

FIG. 9 illustrates an optical article, such as an optical storage medium90. The optical storage medium 90 includes a data storage region 92 anda non-data storage region or inner hub 94. The optical storage medium 90may being transformed from a pre-activated state to an activated stateof functionality. The RF circuitry 96 may interact with RF radiation togenerate thermal energy. As illustrated, the RF circuitry 96 may belocated either on the data storage part 92 as shown or in the inner hub94 of the optical storage medium 90. The optical storage medium 90includes a convertible material 98 coupled to and in operativeassociation with the RF circuitry 96. The convertible material 98 may bein the form of a layer. The layer may be continuous or patterned, or maybe disposed in a discrete portion of the optical article. Further, theconvertible material 98 may include a material that is responsive to thethermal energy produced by the RF circuitry 96. The convertible material98 may include a bleachable dye, a photovoltaic material, a magneticmaterial, an electro-chromic material, thermo-chromic material, orcombinations thereof. In certain embodiments, the convertible material98 may include compounds of merocyanine, stryl, oxonol, or combinationsthereof. Alternatively, the convertible material 98 may be an adhesive,such as a temperature or UV-sensitive adhesive. Preferably the bondstrength of this adhesive will decrease upon exposure to externalstimulus, such as magnetic radiation, RF radiation, microwave radiation,thermal energy or UV light. Examples include adhesives commonly used forsemiconductor wafer dicing tape or an oxirane ring-bearing componentblended or reacted with to achieve an adhesive. The adhesive may alsoinclude an effective amount of ionic photo-initiator capable ofpromoting the polymerization of oxirane rings. In such embodiments, theadhesive may couple the RF circuitry 96 to the surface of the opticalstorage medium 90 in the pre-activated state. Whereas, after reactionwith the thermal energy generated by the RF circuitry 96 as a result ofthe RF circuitry 96 being exposed to the RF radiation, the bond strengthof the adhesive may lessen, thereby facilitating the removal of the RFcircuitry 96 from the surface of the optical storage medium 90 in theactivated state.

In some embodiments, the RF circuitry 96 may include differentmechanisms for converting the RF radiation into thermal energy. Forexample, the RF circuitry 96 may include one or more micro-heaters,heater chips, capacitors, or coils. Further, the RF circuitry 96 mayinclude a programmable logic chip, such as in a radio frequencyidentification (RFID) tag, as will be described with regard to FIG. 10.Upon exposure to the appropriate RF radiation, the RF circuitry 96employing, for example, a heater chip, is energized and converts the RFradiation into thermal energy. This conversion of RF energy into thermalenergy creates a temperature spike of about 50° C. to 200° C. andlocally heats the area of the RF circuitry 96. The convertible materialdisposed proximate to and coupled to the RF circuitry 96 interacts withthis thermal energy, thereby changing an optical property. For example,due to the temperature spike, the dye layer on the optical article 90may be bleached to become transparent to the incident laser. In someembodiments, the monomers in the adhesive, upon interaction with thethermal energy generated by the RF circuitry 96 are cured, resulting indecreased adhesion between the RF circuitry 96 and the optical storagemedium 90. Decreased adhesion facilitates removal of the RF circuitry 96by peeling it off the optical storage medium 90 when the user is readyto use the optical storage medium 90.

As illustrated in FIG. 10, an optical storage medium 100 includes aradio frequency identification (RFID) tag 102 disposed on the datastorage region 104 of the optical storage medium 100. The RFID tag 102in its basic form includes an integrated circuit (IC) operativelycoupled to an antenna 110, which is a small coil of wires. The data isstored in the IC, sent to the antenna 110, and transmitted to a reader.The RFID tag 102 also includes a program logic chip 108 and a capacitor106. In some embodiments, the antenna 110 may be disposed in the innerhub 112 of the optical storage medium 100. The optical storage medium100 includes a layer (not shown) of a convertible material that isdisposed between the RFID tag 102 and the optical storage medium 100.The layer of the convertible element may render an optical state changewhen subjected to thermal energy produced by the RFID tag 102, thusaltering the state of functionality of the optical storage medium 100.

As with FIG. 6, the optical articles 90 or 100 may also be placed in apackaging, such as packaging 62, such that the packaging may direct theRF radiation to at least a portion of the RF circuitry.

FIG. 11 is a cut away perspective view of an optical article, such as anID card 114, having an optical data layer 116 disposed on a substrate118. The ID card 114 also includes a capping layer 120. As with cappinglayer 40 (FIG. 4), the capping layer 120 may chemically and mechanicallyprotect the optical data layer 116. RF circuitry 122 is disposed on andcoupled to a surface 124 of the capping layer 120 as illustrated. The RFcircuitry 122 is coupled to the capping layer 120 by employing aconvertible material (not shown), such as, for example, athermally-reactive adhesive, which is responsive to the thermal energyproduced by the RF circuitry 122 upon interaction with RF radiation. Thebond strength of the adhesive reduces upon interaction with the thermalenergy. Accordingly, during authorization, when the RF circuitry 122interacts with the RF radiation, the adhesive loses its bond strength,thereby facilitating the removal of the RF circuitry from the cappinglayer 120 and making the ID card 114 readable in the activated state.Alternatively, the convertible material may include a thermallyresponsive bleachable dye, such as a thermo-chromic dye, that changescolor upon interaction with the thermal energy. In the pre-activatedstate of the ID card 114, the dye may inhibit the incident laser fromreaching the optical data layer 116 by either reflecting or absorbingthe incident laser. Whereas in the activated state the dye may becometransparent to the incident laser, thereby enabling the incident laserto reach the optical data layer 116 and read the data stored in theoptical data layer 116.

With reference to FIG. 12, a method of changing a functionality of theoptical article, such as optical storage medium 126, is illustrated.Although the illustrated method is with regard to optical storage medium126, it should be appreciated that this method may be employed to changethe functionality of other optical articles, such as an ID card, apayment card, a personal information card, etc., during authorization.The optical storage medium 126 includes a data storage region 128 and anon-data storage region or inner hub 130. The optical storage medium 126further includes RF circuitry 132 disposed on and coupled to the opticalstorage medium 126. The optical storage medium 126 may include aconvertible material (not shown), such as a bleachable dye or anadhesive disposed between the RF circuitry 132 and the optical storagemedium 126. The convertible material may alter the state offunctionality of the optical storage medium 126 as described above withregard to FIGS. 9-11. The method includes employing RF radiation 134 tointeract with the RF circuitry 132. During authorization, the RFcircuitry 132 produces thermal energy by interacting with the RFradiation 134. This thermal energy then reacts with the convertiblematerial and alters an optical property of the convertible material toprovide a readable optical storage medium 126. Following authorization,the RF circuitry 132 is rendered into a detachable form of RF circuitry132′. The detachable form of RF circuitry 132′ may be detached eitherjust after authorization, or may be detached later by the user prior toemploying the optical storage medium in a device, such as a player.

As with FIG. 8, FIG. 13 illustrates a method of transaction of anoptical article having a RF circuitry. At block 136, the opticalarticle, such as optical articles 90, 100, 114 or 126, is received atthe authorization location. At block 138, a respective transaction forthe optical article is received. As noted above with regard to FIG. 8,the transaction may include a monetary transaction in case of a purchaseof the optical article, or the transaction may include identification ofthe person receiving the optical article after authorization. Further,at block 140 the optical article is authorized as described above withreference to FIGS. 9-11.

Additionally, verification of the authorization may be conducted on theoptical article. In such embodiments, the security system installed atthe exit locations or at point of sale may send out signals indicatingwhether or not the optical article is activated. Further, a device maybe installed in the security system, such that the device may interactwith the convertible element in the optical article and make itpermanently unreadable, if the optical article is carried through thesecurity system without being activated. For example, the device mayinteract with the adhesive and make it securely bond the RF circuitry tothe optical article.

In alternate embodiments to dyes and RF circuitry, the optical articlemay include a convertible element that is responsive to electricalstimulus. The convertible element may bring about a change in at leastone of its optical properties upon interaction with an electricalstimulus, such as voltage or current, thereby changing the state offunctionality of the optical article from a pre-activated state to anactivated state. The convertible element may be disposed either on thesurface of the optical article, or inside the structure of the opticalarticle, as will be discussed below.

FIG. 14 illustrates an optical storage medium 142 having a data storageregion 144 and a non-data storage region or inner hub 146. The opticalstorage medium 142 includes an electro-chromic structure 148 disposed inthe data storage region. The electro-chromic structure 148 includes acell structure, having an electrolyte disposed between electrodes, suchas cathode and an anode. When the electrical stimulus is provided to theelectrodes, the transfer of charges takes place between the electrodesvia the electrolytes, thereby causing the optical property of theelectro-chromic structure 148. The electro-chromic structure may bedisposed in a discrete area of the optical article, a continuous layerextending across a portion of the optical article, or a patterned layerextending across a portion of the optical article.

FIG. 15 illustrates an enlarged cross-sectional side view of theelectro-chromic structure 148. The electro-chromic structure 148includes an electrolyte layer 150 interposed between two layers 152 and154 of an electro-chromic material. The electrolyte may be a polymerelectrolyte, such as polyacrylic acid lithium salt. In some embodiments,polymer electrolytes are composites of polyethylene oxide and a salt,such as LiClO4, LiAsF₆, or LiCF₃SO₃. The electro-chromic layers 152 and154 act as anode and cathode and transfer charge to the electrolyte inpresence of applied electrical stimulus using electrical connections156. The electrolyte responds to the applied charge by transferring ionsinto the respective layers 152 and 154. When ions are transferred intolayer 152 or 154, the layer is said to be in a doped state. In the dopedstate, new energy levels are filled or become vacant. The change in thestate of these energy levels gives rise to changes in the opticalabsorption bands of the materials of layer 152 and 154. Theelectro-chromic layers 152 and 154 may inhibit an incident laser fromreading data in the optical data layer of the optical article 148. Inthe pre-activated state of the optical article, the electro-chromiclayers 152 and 154 may either block the incident laser from reflectingback to the reader where it is read, or may absorb the incident laser toprevent the incident laser from reaching the optical data layer. Afterinteraction with the electrical stimulus the electro-chromic layers 152and 154 may become transparent to the incident laser, thereby permittingthe data in the optical data layer to be read by the incident laser.

The two electro-chromic layers 152 and 154 may or may not have similarmaterial compositions. The electro-chromic materials may includepoly(3,4-alkylenedioxythiophene) or poly(3,4-alkylenedioxypyrrole) basedpolymeric materials. For example, the electro-chromic material mayinclude poly(3,4-ethylenedioxythiophene). Alternatively, theelectro-chromic layers 152 and 154 may include inorganic materials. Inan exemplary embodiment, the optical article 148 includes anelectro-chromic structure having electro-chromic layers formed bysputtering tungsten oxide on the surface of the optical article. In someembodiments, the electro-chromic layers 152 and 154 may be a combinationof two or more layers. Additionally, substrates 158 and 160 are coupledto the two electro-chromic layers 152 and 154 and disposed on the sidesopposite the ones in contact with the electrolyte 150.

FIG. 16 illustrates an optical article in the form of a card, such as anID card 164. The card 164 employs an optical data layer 166 disposed ona substrate 168. The card 164 also includes a capping layer 170 whichserves as protective covering of the optical data layer 166. The cappinglayer 170 includes an electro-chromic structure 172 disposed on thesurface 174 of the capping layer 170, which is similar to theelectro-chromic structure 148 (see FIGS. 14, 15) in function. That is,upon interaction with electrical stimulus, the electro-chromic structure172 may change the state of functionality of the card 164.

In alternate embodiments, the electro-chromic structure 148, 172 mayinclude a bi-stable liquid crystal layer. In such embodiments, theelectric field, or a combination of electric field with magnetic, orthermal energy may be applied to the electro-chromic structures 148 or172 to alter the state of functionality of the optical article from thepre-activated state to the activated state.

As noted above, the electro-chromic structure may be disposed inside theoptical article. FIG. 17 and FIG. 18 illustrate alternate embodiments ofoptical storage media 176 and 190 having electro-chromic structure 178disposed within. In the illustrated embodiments of FIGS. 17 and 18, theelectro-chromic structures are coupled to a device, which may alter theexternal stimulus into electrical signal, which may then interact withthe electro-chromic structures to alter the state of the optical storagemedia.

FIG. 17 is a cut away perspective view of an optical storage medium 176illustrating the location of an electro-chromic structure 178 relativeto other layers, such as an optical data layer 180, a substrate 182 anda capping layer 184. The electro-chromic structure 178 may have asimilar configuration of layers as structure 148 of FIG. 15. Similar tothe electrical connections 156 of FIG. 15, converters 186 may be coupledto the electro-chromic layers of the electro-chromic structure 178 toprovide electrical input to the structure 178. The converters 186 are anelectrical device that may convert RF energy into voltage. Theconverters 186 include a Schottky diode coupled to a capacitor. Furtherthe Schottky diode is also coupled to antenna dipoles. As illustrated,the converters 186 may be located in or proximate the inner hub area188. In some embodiments, the circuitry of the converter may include arectenna device.

FIG. 18 is a cut away perspective view of an optical storage medium 190.As with FIG. 17, the optical storage medium 190 illustrates theelectro-chromic structure 178, the optical data layer 180, the substrate182 and the capping layer 184. The optical storage medium 190 furtherincludes an RF circuitry 192 having a Schottky diode 194 electricallycoupled to the electro-chromic structure 178 via connectors 196. The RFcircuitry 192 further includes an antenna 193 and a capacitor 195 asshown in the blown-up section. Although not illustrated, in an alternateembodiment, instead of being disposed inside the structure 178 of themedium 176, the RF circuitry 192 may be disposed on and coupled to thetop surface of the medium 178. For example, the RF circuitry 192 may bedisposed on the capping layer 184 and coupled to the electro-chromicstructure 178 via connectors, such as connectors 196 which may passthrough the thickness of the capping layer 184 to be coupled to theoptical data layer 180.

Alternatively, the optical article, such as an optical storage medium176 may employ an RFID tag, which may convert RF radiation into anelectrical signal. Such an RFID tag may include radio circuitry as wellas logic circuitry. In one embodiment, such an RFID tag may be embeddedin the structure of the optical storage medium along with anelectro-chromic structure. In this embodiment, the optical storagemedium 176 may be activated by providing external radiation, such as RFor microwave radiation, to interact with the RFID tag. In anotherexample, the electro-chromic structure 176 may be employed at thelocation of the data layer, which contains the tailored menu. As notedpreviously, the external radiation may be provided in the form of apulse or a pulse sequence.

In other embodiments, the optical article, such as optical storagemedium 142 or 176 may include several other mechanisms of converting theexternal RF or microwave radiation into an electrical signal. Forexample, the optical article may include a pair of coil antennas. Thesecoil antennas may be similar to the antennas employed in an RFID tag.The first coil antenna of the pair may be responsive to a first resonantfrequency, and the second coil antenna of the pair may be responsive toa second resonant frequency. One of the first or second frequenciesinteracts with the electro-chromic structure to render the structuretransparent to the incident laser, and the second frequency interactswith the electro-chromic structure to render the structure opaque to theincident laser.

Alternatively, a pair of high inductance and low inductance coils may beemployed to change the functionality of the optical article. The highand low inductance coils may produce electrical signals in response toexternal radiation, such as RF or microwave radiation. The electricalsignals from the two coils may interact with the electro-chromicstructure to render the optical article readable.

FIG. 19 illustrates an embodiment of an optical storage medium 198employing a layer 179 of a thermo-chromic layer, which is coupled to anRF circuitry 200. The RF circuitry 200 further includes an antenna 201,which is connected to a Nichrome wire 204. In turn, the Nichrome wire204 is coupled to the layer 179. The Nichrome wire 204 may act as aheater to provide heat to the thermo-chromic material of the layer 179,the thermo-chromic material upon reaction with the heat may changecolor, thereby altering the state of functionality of the opticalstorage medium 198. The Nichrome wire 204 may be coupled to the anode ofthe RF circuitry 200. The RF circuitry 200 may optionally include acapacitor. In these embodiments, the antenna 201 may be exposed to theexternal electric field to charge the capacitor, subsequently, thecapacitor may be discharged to transfer the current to the Nichrome wire204, thereby heating the Nichrome wire 204.

FIG. 20 illustrates a method of disabling the tailored menu of anoptical storage medium 208 by employing an external stimulus, such asradio frequency radiation 206. In the pre-activated state, the opticalstorage medium 208 includes a directing material, such as a metal foilor conductive mask, 212 disposed on the entire surface or a portion ofthe optical storage medium 208, including the data storage region 216and a portion of the inner hub 210. The directing material 212 mayenclose one or two sides of the optical storage medium 208.Alternatively, the directing material 212 may be attached to an opaquesubstrate, the directing material 212 being inside the opaque substrate.The directing material 212 may include an opening 214 at a location,which employs the tailored menu. Upon exposure to RF radiation 206, theportion of the optical data layer beneath the opening 214 may bedestroyed. With the optical data layer damaged, that particular portionof the optical data layer may not be able to reflect the incident laser.Hence, no valid optical signal may reach the reader until the opticalincident laser has passed the physical location of the tailored menu.Further, the RF radiation may remove the directing material 212 frommost of the parts of the optical storage medium 208 by, for example,evaporation. In some embodiments, a portion 212′ of the directingmaterial 212 may remain on the optical storage medium 208, which may beremoved manually, without adversely affecting the optical storage medium208. In some embodiments, the user may remove the directing material 212from the optical storage medium 208 in the activated state prior toplaying the disc.

FIG. 21 is a cut away schematic view of an arrangement for providingexternal power supply to an electro-chromic structure 218 coupled to anoptical article 220. The optical article 220 is housed inside a case orpackaging 222, which has a central region 224 and a peripheral region226. The packaging 222 is placed on and operatively coupled to acharging pad 228, which includes electrified rails 230. The electrifiedrails 230 are coupled to an external power supply (not shown) such thatwhen the external power supply is turned on, the electrical currentpasses through the electrified rails 230 and charges the charging pad228. This charge is then transferred to the electro-chromic structure218 by employing a conductive path 232 that is coupled to electrodes234. Further, electrodes 236 are used to electrically couple theelectro-chromic structure 218 to the packaging 222.

FIG. 22 is a flow chart illustrating a method of transaction of anoptical article having an electro-chromic structure, such as structures148, 172, or 176. At block 238, the optical article, such as opticalarticle 142, 164, 176 or 192, is received at the authorization location.At block 240, a respective transaction for the optical article isreceived. Further, at block 242, the optical article is authorized asdescribed above with reference to FIGS. 14-16. Additionally,verification of the authorization may be conducted on the opticalarticle as described above with reference to FIGS. 8 and 13.

Example 1

Bleachable dyes were incorporated into extruded and molded polycarbonatematrix, PC 175 obtained from GE Plastics (Mt Vernon, Ind.). The weightpercent of the polycarbonate matrix was 94 percent. Methylene bluetri-hydrate obtained from Wilson Laboratories (Mumbai, India) wasblended with polycarbonate matrix along with 0.06 weight percent heatstabilizer, Irgafos 168 obtained from Ciba-Geigy and 0.26 weight percentmold release agent, pentaerythritol tetrastearate obtained from Lonza.The blend was extruded using an extruder ZSK-25 Twin Screw obtained fromW&P-Warner & Pfleiderer. 400 mg of dye was loaded along with 1 Kgpolycarbonate matrix, 600 mg of heat stabilizer and 2600 mg of moldrelease agent. The temperature in the extruder was maintained between275° C. to 295° C., torque between 60-65 units, rpm of 300, and feedrate of about 118 Kg/h.

The samples so formed were then exposed to a tungsten halogen lampsource, 120 Watt Halogen XTRA Capsylite PAR38® floodlight obtained fromOsram Sylvania product, Inc. (Winchester, Ky.). A 3 inch distance wasmaintained between the source and sample disc. Color and transmissionmeasurements were done on a Gretag-Macbeth 7000A spectrophotometer. Datawas recorded using a 2 degree observer setting and a D65 source in thetransmission mode. Data on the unexposed chip was recorded as data attime=0. Subsequent measurements were taken at 30 minutes and 60 minutesintervals. The variation in percentage transmittance at 650 nm wasobserved as a function of exposure time. An increase in percenttransmittance of 14 units over a period of 120 minutes was seen as thelamp bleached the dye.

Example 2

Samples were prepared by coating a series of DVDs using polymethylmethacrylate based coatings, Elvacite 2008 obtained from LuciteInternational Inc (Parkersburg, W. Va.) containing 0.1 percent to 2percent of a photobleachable dye. Examples of photobleachable dyesinclude methylene blue, azure B, cryptocyanine, IR125, H.W. Sands 7995.The thickness of the coatings was in a range from about 5 micrometers toabout 10 micrometers. The samples were exposed to white light from a 6.5W tungsten lamp, model LS-1 obtained from Ocean Optics (Dunedin, Fla.).The lamp with color temperature of 3100 K was connected to a fiber opticprobe. The probe was positioned about 1 cm above the PMMA/dye film.Reflectance spectra were captured via an USB 2000 spectrometer obtainedfrom Ocean Optics (Dunedin, Fla.) as a function of exposure time of thesamples to the white light. Plots showing the change in reflectance at650 nm versus exposure time are illustrated in FIG. 23. The ordinateshows the values of percent reflectance with reference to time shown onthe abscissa. FIG. 23 specifically shows a plot of two dyes showingrelatively faster bleaching, including HW Sands MSA3367 as shown byreference numeral 244 and diarylethene as shown by reference numeral246. The diarylethene dye molecule is an example of a class ofphotochromic dyes that can convert from a blue color (strong absorbanceat 650 nm) to a yellow color (weak absorbance at 650 nm) upon exposureto visible (eg. 650 nm) light. Cryptocyanine obtained from AldrichChemicals (Milwaukee, Wis.), another dye used in the experiment showedrelatively slower bleaching rates as illustrated by reference numeral248. The characteristic bleaching time of the various dyes coated onthese samples is provided in Table 1.

TABLE 1 Time vs. reflectivity Dye Time to 45 percent reflectivity(Seconds) MSA3367 100 Diarylethene 300 Cryptocyanine 4000

Example 3

Samples were prepared by spin coating a series of DVDs with polymethylmethacrylate based coatings having photobleachable dyes. Theconcentration of the dye in the original solution before spin coatingwas varied between 1 percent to 14 percent. Methylene blue, and 2.5percent and 4 percent aluminum phthalocyanine chlorides obtained fromAldrich Chemical (Milwaukee, Wis.) were used as dyes. Regions of DVDswere then exposed to a 650 nm laser diode using various laser powers ina range from about 10 mili-watt to about 75 mili-watt, while spinningthe disc at 2 to 30 rpm. UV-visible spectra of the exposed and unexposedregions of the DVDs were then measured. Also, percentage transmittanceat 650 nm and at 780 nm were measured for these two regions of the DVDs.Table 2 provides the values of reflectivity for different exposureconditions of the dyes. Methylene blue coated DVD demonstrated asignificant increase in reflectance at 650 nm after exposure to the redlaser.

TABLE 2 Reflectivity as a function of Exposure Conditions and incidentlaser Exposure Conditions % % Current Power Reflectivity ReflectivityDye (mA) (mW) RPM at 650 nm at 780 nm 4% 40 11 30 6.5 13.2 Aluminum 4516 30 7.5 14.8 Phthalo- 50 22 30 8.0 16.5 cyanine 60 32 30 8.5 17.9Chloride 70 43 30 8.4 17.7 80 53 30 12.7 24.8 80 53 2 8.5 49.8 2.5% 4011 30 8.2 13 Aluminum 50 22 30 9.1 12.9 Phthalo- 60 32 30 9.7 14.4cyanine 70 43 30 10 15.2 Chloride 80 53 30 10.5 18.8 80 53 2 6.5 43.4 1%Unbleached 9.1 95.7 Methylene 50 22 30 8.0 85.6 blue 80 53 30 9.2 52.9100 73 30 8.0 38.1 100 73 2 22.9 65.2

Example 4

A diarylethene dye was dissolved (at 0.5 weight percent concentration)in the UV-curable adhesive used to manufacture a DVD. Regions of thedisc were then exposed to a 650 nm laser diode using varying laserpowers while spinning the disc at 2 to 30 rpm. The regions of the discare effectively bleached using laser powers greater than about 35 mA orgreater than about 5 mW. This is a laser power that is commonlyachievable in consumer DVD players and drives.

Example 5

A DVD was spin-coated with a polymethyl methacrylate coating containinga diarylethene dye. The DVD was first exposed to visible light (using a100 W halogen lamp with a 400 nm cutoff filter) to effectively bleachthe diarylethene dye to its colorless form. The DVD was tested in anelectrical tester, Lite-On SOHW 1673 DVD-RW drive using Kprobe software.The disc was then exposed to UV light using a photomask to create firstthree 3 mm-diameter spots and second to three 2 mm-diameter spots tocreate regions in the disc coating in which the diarylethene dye isconverted to its blue colored form. Then, the discs were exposed tovisible light to bleach the dye, thereby removing the blue spots. Thisexample showed: 1). the blue spots created by the diarylethene dyecreate errors, and 2) bleaching of the dye to remove the blue spotsreduces PO (parity errors for outer array) errors. It should beappreciated that if PO errors are located at appropriate sectors(logical block addresses) the playability of the disc may be affected.In some cases, if enough PO errors are present or if the PO errors occurat or near the table of contents region of the disc, the disc will notbe bootable. Then, upon bleaching of the disc and removal of the POerrors, the disc will become bootable and readable.

Example 6

A first film of electro-chromic material, Orgacon EL350 havingdimensions 2 cm×2 cm was obtained from Agfa-Gevaert NV, SFC Division,Septestraat (27 B-2640 Mortsel, Belgium). The film had a conductive anda non-conductive side. The conductive side of the film was coated with adrop of an ionic conductive material, butylmethylimidazolium bromide(BMIMBr) obtained from Aldrich Chemical (Allentown, Pa.). A second filmof Orgacon EL350 was placed on the electrolyte drop causing the drop tospread evenly between the two films. Excess electrolyte was wiped cleanfrom the edges of the sandwiched Orgacon EL350 films. The ionicconductive material, in this case BMIMBr, served as an electrolyte andthe two electro-chromic layers of Orgacon EL350 as anode and cathode.The electro-chromic layers where attached to a reflective surface of aDVD. Electrical contact with the anode of an external power supply wasmade with the initial Orgacon EL350 film, and electrical contact withthe cathode of an external power supply was made with the second OrgaconEL350 film. When current flowed from the power supply to theelectro-chromic layer, a noticeable blue color forms in theelectro-chromic layers. The transmissivity of the bleached and coloredlayers were measured. FIG. 24 illustrates UV-visible spectra 250 and 252of the electro-chromic structure showing percent transmittance onordinate axis and wavelength on abscissa. The plot 250 indicates thepercent transmittance prior to application of voltage and plot 252illustrates the percent transmittance after application of the voltageto the electro-chromic structure. The graphs indicate reduction inpercent transmittance or increase in reflectivity after application ofDC voltage of about 1 Volt to the electro-chromic layers.

Example 7

Malachite green and bromocresol dye Malachite Green (CAS: 96-49-1,Product No M0050, Rankem, Ranbaxy) were incorporated in polycarbonate bysolvent casting method. 0.5 gm of PC 175 was dissolved in 40 ml ofDichloromethane and to that was added 5 mg of malachite green. Thesolution was transferred into petri plates and was allowed to standstill undisturbed for 4-5 hours. The PC film was removed carefully forphoto bleaching experiments. The composition of the blend is shown inTable 3.

TABLE 3 Blend Composition Weight Component Details Percent PC175Polycarbonate with a molecular weight of 99 about 40,000 daltonsobtained from GE Plastics Dichloromethane Solution of 0.5 grams ofpolycarbonate in 40 mililitres of methylene chloride Malachite GreenCAS: 96-49-1 Product No M0050, obtained 1 from Rankem, Ranbaxylaboratories

The film samples were recorded for their transmission data in theirunexposed state on Gretag-Macbeth Color Eye 7000A spectrophotometer.Further sample films were exposed to a Xenon lamp source with 0.75 W/m2at 340 nm wavelength, (Xenon Weather-ometer Ci5000, Atlas, US).Transmission measurements of exposed samples were recorded on aGretag-Macbeth Color Eye 7000A spectrophotometer. Data was recordedusing a UV D65 source in the transmission mode. Data on the unexposedsample were recorded as data at time=0 minutes. Subsequent measurementswere taken at 5, 15, 20, 25, 30, 45, 60 minutes intervals as shown inTable 4 below. The variation in percentage transmittance at 640 nm is afunction of exposure time. An increase in percent transmittance of 55units over a period of 60 minutes is seen as the lamp bleaches the dye.

TABLE 4 Percent Transmittance at 640 nanometer Percent Transmittance at640 nanometer Time (min) wavelength 0 2.91 5 3.423 15 7.083 20 21.774 2529.241 30 43.283 45 53.112 60 57.934

Methods for bleaching dyes incorporated into a solvent cast film in apolycarbonate matrix are described in this example. Bromophenolblue(CAS: 115-39-9, sd fine) was incorporated in polycarbonate by solventcasting method. 0.5 gm of PC 105 was dissolved in 40 ml ofDichloromethane and to that was added 1 mg of BromoPhenolblue (CAS:115-39-9, sd fine), 1 mg of 4-(Dimethyl Amino)-Pyridine (DMAP, CAS:1122-58-3) and 25 mg of Photo acid generator, PAG,Tris-(4-tert-butylphenyl)sulfonium triflate (TBPT, CAS: 134708-14-8,Aldrich). The solution was transferred into petri plates and was allowedto stand still undisturbed for 4-5 hours. The PC film was removedcarefully for photo bleaching experiments. The composition of the blendis shown in Table 5.

TABLE 5 Blend Composition Weight Component Composition Percent PC105Polycarbonate with molecular weight of 94.6 64,000 daltons obtained fromGE Plastics Dichloromethane Solution of 0.5 grams of polycarbonate in 40mililitres of methylene chloride DMAP 4-(Dimethyl Amino)-Pyridine 0.2TBPT Photo acid generator 5 Bromophenol blue CAS: 1122-58-3 obtainedfrom Aldrich 0.2 Chemicals

Transmission data for the film samples were recorded in their unexposedstate using a Gretag-Macbeth Color Eye 7000A spectrophotometer. Furthersample films were exposed to a Xenon lamp source with 0.75 W/m2 at 340nm wavelength, (Xenon Weather-ometer Ci5000, Atlas, US). Transmissionmeasurements of exposed samples were recorded on a Gretag-Macbeth ColorEye 7000A spectrophotometer. Data was recorded using a UV D65 source inthe transmission mode. Data on the unexposed sample was recorded as dataat time=0 minutes. Subsequent measurements were taken at 15 and 30minutes intervals as shown in Table 6 below. The variation in percentagetransmittance at 610, 620 and 630 nm is a function of exposure time. Anincrease in percent transmittance of 64 units over a period of 30minutes is seen as the lamp bleaches the dye. Although example 7illustrates the concept in a solvent cast film, similar experiments mayalso be done in molded parts containing the bleachable dye.

TABLE 6 Percent Transmittance at 610, 620 and 630 nm Percent PercentPercent transmittance at transmittance at transmittance at Time(minutes) 610 nm 620 nm 630 nm 0 7.052 10.823 24.646 15 61.72 66.61974.93 30 71.318 74.886 80.472

Example 8

A 13.56 MHz wireless thermo-chromic circuit is fabricated using standardlithography techniques in the clamp area of a DVD. The rectenna portionof the circuit employs a circular coil antenna, a capacitor, and aSchottky bridge diode. The dc terminal leads from the Schottky diode areconnected to the anode and cathode of an electro-chromic device (ECD)situated over an active sector of the DVD. The impedance of the ECD loadis matched to the rectenna by control of the dimensions of the ECD tomaximize the efficiency of RF to DC conversion. The ECD is fabricated byspin casting two layers of UV treated (360 nm) PEDOT-PSS doped with 0.5wt % 1,2-bis(5′,2′-di(thiophen-2-yl)thien-3′-yl)perfluorocyclopenteneseparated by a layer of amorphous polyethylene oxide doped with 10 wt %lithium trifluoromethane sulfonate. Initially, the DVD is unplayable inthe dark blue state owing to the optical absorption of the ECD at 650 nmWhen the disc containing the ECD is exposed to 13.56 MHz RF, bleachingof the ECD at 650 nm is observed as evidenced by a transition of the dyefrom the initial dark blue color to pale yellow color. The DVD isplayable in the bleached (activated) state.

Example 9

A 13.56 MHz wireless thermo-chromic device (TCD) is fabricated usingstandard lithography techniques in the clamp area of a DVD. The rectennaportion of the device employs a circular coil antenna, a capacitor, anda Schottky bridge diode. The dc terminal leads from the Schottky diodeare connected to 1 mm×2 mm strands of interwoven Nichrome and copperwire situated within 2 mm of an active sector of the DVD. The impedanceof the Nichrome and copper load are matched to the rectenna by controlof the wire dimensions to maximize the efficiency of RF to DCconversion. A thermochromic layer of Thermax SC-155 (ThermographicMeasurements Co. Ltd, Flintshire, UK) with a transition temperature of155° C. is deposited on an active sector of the DVD near the interwovenNichrome and copper strands. Initially, the DVD is unplayable in thepre-activated state owing to the optical absorption of dark blue layerof SC-155 at 650 nm. When the disc containing the TCD is exposed to13.56 MHz RF, bleaching of the thermochromic layer at 650 nm is observedas evidenced by a transition of the layer from the initial dark bluecolor to a brown color as a result of resistive heating in theNichrome/copper strands. The DVD is playable in the bleached (activated)state.

Example 10

A DVD was partially covered in a removable conductive mask comprised ofheavy aluminum foil tape. The foil covered both surfaces of the DVD withthe exception of a 18 mm diameter hole. The masked DVD was placed in acommercial 1000 W delivered, 1.5 kW consumed) microwave oven (SharpCarousel R4A38) and exposed to 2.45 GHz radiation for 2-3 sec. The DVDwas removed from the oven and the aluminum foil was removed. Opticalmicroscopy performed on the DVD indicated that significant damage(micro-cracks) were formed in the reflective layer of the DVD at theunmasked region, and no damage within the 18 mm hole in the foil.Another DVD was masked with aluminum foil and exposed to microwave in asimilar fashion to create a damaged region near the table of contentsregion of the DVD. The resulting DVD was unplayable. Other DVDs can bemasked with foil and exposed to microwave to damage specific regions inthe disc to make specific data sectors in the disc unplayable. It can beappreciated that when this is combined with a tailored menu, this methodof masking the disc with a removable conductive overlay and exposing itto microwave can be used to activate the disc. That is, when appropriatedata sectors are destroyed via this method, the tailored menu will allowthe predetermined content (e.g., the movie) on the disc to be playable.

While the invention has been described in detail in connection with onlya limited number of embodiments, it should be readily understood thatthe invention is not limited to such disclosed embodiments. Rather, theinvention can be modified to incorporate any number of variations,alterations, substitutions or equivalent arrangements not heretoforedescribed, but which are commensurate with the spirit and scope of theinvention. Additionally, while various embodiments of the invention havebeen described, it is to be understood that aspects of the invention mayinclude some of the described embodiments. Accordingly, the invention isnot to be seen as limited by the foregoing description, but is onlylimited by the scope of the appended claims.

1. A system for altering a functionality of an optical article from apre-activated state to an activated state, comprising: an opticalarticle comprising an optical data layer for storing data; an externalradiation source for generating an external stimulus adapted to interactwith the optical article, such interaction causing a change in opticalaccessibility of optically stored data; a directing material, whereinsaid directing material is for directing the external stimulus toselective portions of the optical article, thereby altering thefunctionality of the optical article from a pre-activated state to anactivated state; a convertible element capable of responding to theexternal stimulus to irreversibly alter the optical article from thepre-activated state of functionality to the activated state offunctionality and wherein said convertible element comprises acolor-shift dye, a magnetic material, a thermo-chromic material, amagneto-optical material, a light scattering material, a phase-changematerial, dye aggregates, or combinations thereof.
 2. The system ofclaim 1, wherein said directing material is patterned such that onlycertain wavelengths of the external stimulus are directed to the opticalarticle.
 3. The system of claim 1, wherein said directing material isremovable in the activated state.
 4. The system of claim 1, wherein thedirecting material comprises metal foil enclosing one or two sides ofthe optical article.
 5. The system of claim 1, wherein the directingmaterial comprises metal foil attached to an opaque substrate, the metalfoil being inside the opaque substrate.
 6. The system of claim 1,wherein the convertible element is for rendering an optical statechange, wherein said optical state change comprises at least one fromthe group consisting of layer reflectivity, refractive index,birefringence, polarization, scattering, absorbance, thickness, opticalpathlength, and position.
 7. The system of claim 1, wherein thepre-activated state is characterized by an optical reflectivity of atleast a portion of the optical article comprising the convertibleelement being less than about 45 percent and said activated state ischaracterized by an optical reflectivity of at least the portion of theoptical article comprising the convertible element being more than about45 percent.
 8. The system of claim 1, wherein an optical reflectivity ofthe optical article in both said pre-activated and activated states ismore than about 45 percent and readability of the optical article insaid pre-activated state is available for a finite period of time. 9.The system of claim 1, wherein said optical article comprises one of aCD, a DVD, a HD-DVD, a near field optical storage disc, a holographicstorage medium or a volumetric optical storage medium.
 10. The system ofclaim 1, wherein the optical article is an identification card, apassport, a payment card, a driving license, or a personal informationcard.
 11. The system of claim 1, wherein said convertible element altersa functionality of said optical article upon interaction with one ormore of a thermal energy, ultrasound waves, chemical energy, magneticenergy, and mechanical energy.
 12. The system of claim 1, wherein saidconvertible element is disposed in a discrete area of the opticalarticle, a continuous layer extending across a portion of the opticalarticle, or a patterned layer extending across a portion of the opticalarticle.
 13. The system of claim 1, further comprising a packaging forthe optical article, wherein said packaging enables an external stimulusto be directed toward at least a portion of said convertible material.14. The system of claim 13, wherein said packaging comprises a windowaligned with said at least a portion of said convertible material. 15.The system of claim 1, wherein at least a portion of said optical datalayer comprises a tailored menu, wherein said tailored menu renders theoptical article un-readable in said pre-activated state offunctionality.
 16. The system of claim 15, wherein said tailored menufacilitates display of a message upon interaction with a laser.